"The DPRK (North Korea) abrogates all agreements on nonaggressions reached between the North and the South," said a government statement, reports the South's Yonhap News Agency. Pyongyang also said it was closing the Panmunjom crossing point between the two countries, reports the BBC. Leader Kim Jong Un reportedly visited front-line troops and told them to be ready to "annihilate the enemy." Meanwhile, a general warns that "intercontinental ballistic missiles ... are on a standby," ready to turn Washington into "a sea of fire." The South is hitting back, the New York Times reports: If the North launches a nuclear attack southward, Kim's regime "will be erased from the Earth," the South says.